Syntax
=====

.. code-block:: text

    nume_ddl_gene = NUME_DDL_GENE (
        ◆/MODELE_GENE = gene_model,
          /BASE = mode_gene/mode_meca,
        # If: exists (" MODELE_GENE ")
            ◇ STOCKAGE =/"LIGN_CIEL" (by default),
                         /"PLEIN ",
            ◇ METHODE =/"INITIAL ",
                        /"CLASSIQUE" (by default),
                        /"ELIMINE ",
        # If: exists (" BASE ")
            ◇ STOCKAGE =/"DIAG ",
                         /"PLEIN" (by default),
            ◇ NB_VECT = int,
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices